Sole traders and partnerships: to claim more than 25% business use of a vehicle, a detailed logbook must be kept for a 3-month test period, and it remains valid for up to 3 years. Without a logbook, the business-use claim is limited to a maximum of 25% of vehicle expenses.
Companies: vehicles owned by the company and available for private use by shareholders or employees may be subject to Fringe Benefit Tax (FBT) instead.